Apparatus for applying sealing fluid to can blanks



Sept. 21, 1937. v J. E. DIAMOND ET AL 2,093,422

APPARATUS FOR APPLYING SEALING FLUID TO CAN BLANKS Filed Sept. 26, 1935 FIG. I.

. Jrwmm l w JAMES [DWA RD DIAMOND, CHARLES WILLIAM PERKINS,

V, 5g, W.

Patented Sept. 21, 1937 UNITED: STATES .APPQRATUS FOR APPLYING- SEALING FLUID TO CAN BLANKS James Edward Diamond, (iosi'ortli, and Charles William Perkins, Balham, London, England, assignors to James Jermyn Prltty, Surrey, England Application September 26, 1935, Serial No. 42,296

' In Great Britain October 17, 1934 5 Claims. (Cl; 113-1) sequently nipped together to form an airtight seam.

The object of our invention is to provide an improved apparatus for controlling the supply of sealing material and preventing the splashing and wastage.

The present invention consists in apparatus for applying sealing fluid to the preformed side seam elements of substantially flat blanks adapted to be subsequently bent to form the bodies of cans or like containers, the said apparatus comprising in combination a fixed nozzle provided with an outlet, means for supplying sealing fluid to the said nozzle, a beveled closure member for said outlet external to the nozzle and in substantially axial alignment therewith, a spring adapted normally to maintain the closure in contact with the nozzle outlet to maintain the same closed, and between which closure and the nozzle the preformed side seam elements of each 01' a plurality of can blanks are adapted to be passed in sequence to each open the outlet from the nozzle whereby sealing fluid is applied to the side seam elements, which outlet is subsequently closed-by the spring projected closure in the intervals between the passage of the blanks.

A further feature of the invention consists in apparatus according to the preceding paragraph, wherein the sealing fluid is adapted to issue from the nozzle under pressure.

A further feature of the invention consists in apparatus according to the penultimate paragraph comprising means for bending the edge of the blank upwardly to define with the main. portion of the blank an edge of substantially V- section, and means for directing the, sealing fluid from the nozzle into the angle formed by said bent edge.

The bending of the edge of the blank upwardly has the added advantage that when during subsequent operations the blank is moved rapidly, the turning up of the edge to form a side seam hook prevents the sealing material from being thrown on in the outward direction as the blank is subjected to the subsequent operations.

We will more fully describe one embodiment of our invention with reference to the accompanying drawing wherein:

Figure 1 is a diagrammatic elevation showing one construction of apparatus in accordance therewith, and

' Figure 2 is a plan thereof;

Figures 3- and 4 are elevations to a-larger scale showing-the valve and adjacent parts, the valve being closed in Figure 3 and open in Figure 4,

Figures 5 and 6 are plan, views of Figures 3 and 4 respectively, and Figure 7 is a. diagrammatic elevation of a side seam bending device.

Referring to the said drawing, in the exampletherein illustrated, a storage tank a for holding sealing material, e. g. a rubber or latex dope, or the like, is mounted on any suitable part of the can-making machine, said tank being pressure fed and kept at the required pressure by means of a reducing valve 1). A pressure gauge c indicates the pressure in the tank. The sealing material is led through a pipe d to a strainer e, from which it flows through a pipe I to a nozzle holder 9, one end of which is internally threaded and into-which a nozzle h isscrewed. The nozzle illustrated is of the single hole type, but may be provided with .two or more holes. The nozzle holder g is mounted on a plate attached to a stationary part of the machine in any suitable manner. One side edge of each blank k is i turned up to form a side seam hook m (see Figs.

vice is positioned in. the path of the edge of the blank in front of the nozzle h, as indicated in Fig. 5. Fig. '7 shows that this device consists of a bell crank it having one end operated by a connecting 'rod 2; from an eccentric (not shown) on the machine and the other end passing across a bevelled plate w at an angle of about 45", thereby bending up the edge m of the blank k as it passes between supports" 1 and z. The nozzle h is positioned so that the mouth of the nozzle h For this purpose a side seam bending delies just clear of the side seam hook of each blank as it passes through the machine.

Adapted to enact with the mouth of the nozzle 11. is an external closure 11. co-operating with said nozzle 72. and forming a valve, said external 010- 4 'of said holder. The holder p is suitably attached to a stationary part. of the machine adjacent to the nozzle h. The head t of the external closure n is bevelled or rounded and has a central flat portion which is normally held against the mouth of the nozzle h by the spring 1', thus shutting oif In operation, the supply of sealing material is I normally cut oi! by the head t contacting with the nozzle h, but, when the leading edge oi the side seam hook m of a travelling blank It strikes against the bevelled portion of the head t, it

forces back the external closure n against its spring 1' and the bend oi the side seam hook m allows the sealing material to flow from the nozzle into the channel of the side seam hook m, and a layer of sealing material is thus delivered into the channel. When the trailing edge or the travelling blank It leaves the head t, the spring r automatically closes the valve, and the valve remains closed until the next blank comes along.

It will be seen that no sealing material is wasted. as it is only delivered by the nozzle it into a'preformed channel while each blank is passing the nozzle.

What we claim and desire to secure letters Patent is:-

1. Apparatus for applying sealing fluid to the preformed side seam elements of substantially flat blanks adapted to be subsequently bent to form the bodies 0! cans or like containers, the said apparatus comprising in combination a flxed nozzle provided with an outlet, means for supplying sealing fluid to the said nozzle, a bevelled closure member for said outlet external to the nozzle and in substantially axial alignment therewith, a spring adapted normally to maintain the closure in contact with the nozzle outlet to maintain the same closed, and between which closure and the noasle the preformed side seam elements of each oiapluralityotcanblanksareadaptedtobe passed in sequence to each open the outlet from the nozzle whereby sealing fluid is applied to the side seam elements, which outlet is subsequently closed by the spring miected closure in the intervals between the passage of the blanks.

2. Apparatus according to claim 1 having means tor supplying the sealing fluid under pressure to the nozzle.

3. Apparatus according to claim 1, comprising means (or bending the edge oi the blank upwardly to deflne with the main portion of the blank an edge of substantially V-section, and'means for directing the sealing fluid from the nozzle into the angle formed by said bent edge.

v4. Apparatus according to claim 1, having a substantially cloud storage tank for the sealing gfluid, a pipe for the application of pressure to the said tank, an outlet pipe from the said tank to the nozzle tor the passage of sealing fluid to the said nozzle, the parts being arranged in such a manner that the sealing fluid is substantially enclosed prior to its emission irom the nozzle outlet.

6, Apparatus according to claim 1, having a substantially closed storage tank for the sealing fluid, a pipe for the application of pressure to the said tank, an outlet pipe from the said tank. a strainer attached to that end of the pipe remote from the tank and an outlet pipe from the said strainer to the nozzle for the passage of sealing fluid thereto, the parts being arranged in such a manner that the sealing fluid is substantially enclosed prior to its emission irom'the nozzle outlet.

JAMES EDWARD DIAMOND. CHAN-E8 WILLIAM 

